Hugh patterson



(No Model.) 7

H. PATTERSON, J. MAOOORMAGK & L. VAN ZILE. STEAM BOILER.

No. 421,509. Patented Feb. 18, 1890.

m n I mm m L 1 1 2 I llllli 7 2 o filllxliil w T w W L m d 1 1% IF Mm M J latmflw m J W C 4 I I J Ithe combustion of fuel in its furnace.

UNITED STATES PATENT OEEIcE.

HUGH PATTERSON, JOHN MACOORMACK, AND HARRY L. VAN ZILE, OF ALBANY, NEWV YORK; SAID MAOOORMAOK AND VAN ZILE ASSIGNORS OF PART OF THEIR INTEREST TO SAID PATTERSON.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 421,509, dated February 18, 1890.

Application filed November 6, 1889. Serial No. 329,411. (No model.)

To all whom, it may concern:

Be it known that we, HUGH PATTERSON, J OHN MAoOoRMAoK, and HARRY L. VAN ZILE, all of the city and county of Albany, in the State of New York, have invented new and useful Improvements'in Steam-Boilers, of

which the following is a specification.

Our invention relates to improvements in multitubular steam-boilers of the class in which the precincts of combustion pass vertically through the tubes; and the object of our invention is to provide a boiler that will more perfectly utilize the heat generated by This object we attain by the means illustrated in the accompanying drawings, which are herein referred to and form part of this specification, andin which- Figure 1 is a vertical longitudinal section of our boiler and its setting. Fig. 2 is a vertical transverse section of Fig. 1 at the line X X, with the primary boiler shown in'elevation and Fig. 3 is a horizontalsection of Fig.

l at the line Y Y.

Our invention consists in combining'two multitubular vertical boilers that are connected together in such manner that a free circulation of both the steam and water will be obtained between the two, one of said boilers (which is hereinafter referred to as the primary boiler) being located directly over the fire chamber, so that the heated products of combustion will pass upwardly through the tubes of said primary boiler, and the other boiler (which we preferably make of smaller diameter, but of greater height) being located between said primary boiler and the outlet for the escape of the spent products of combustion, the secondary boiler being so arranged in relation to the primary boiler that the heated products of combustion emerging from the tubes of the primary boiler will pass downwardly through the tubes of the secondary boiler and from thence toward the escap eoutlet, the said primary and secondary boilcrs being connected together in such manner as to be separable from each otheiu As represented in the drawings, A desighates the primary boiler, and B the secondary or adj unctive boiler, and the two are connected together by an upper connecting-pipe 1, which is located either partially or entirely above the water-line of the boiler, and a lower connecting-pipe 2, which is located entirely below said water-line, each of said connecting-p'ipesbeing made in two pieces, so as to be separable about midway of their length, and the corresponding ends of the piece-s being permanently secured to the boiler to which said piecesare allotted,each pieceof said connecting-pipes being provided with a flange that is fitted to join with and be secured to a corresponding flange of the oonjoining piece of pipe, and thereby said primary and sec- ;ondary boilers are rendered readily separable from each other when occasion requires. By means of said connecting-pipes ample pro- .vision is made for a free circulation of both @water and steam from one of saidboilers into the other, so that the heat and pressure will be perfectly equalized in both of them.

' O is the boiler-setting, which is commonly made of brick-work, and which includes a firechamber 'D, which is. formed directly under the lower end of the primary boiler A, so that the heated gases and other volatile products of combustion will pass upwardly through the tubes of said boiler. Said setting also i11- cludes an ash-pit E, formed directly under said fire-chamber, a pass-over flue F, formed over the upper end of both of said boilers, as a communication from the tubes of the primary boiler to the tubes of the secondary boiler, a heated air chamber G, formed between the cylindrical bodies of the primary and secondary boilers, a flue H, which leads from the lower end of the secondary boiler to the outlet for the escape of the spent products of combustion, and an escape-outlet I, which leads from the line II to the pipe or fine for carrying off said spent products. Said setting is provided with one or more feedingdoors J, which are preferably arranged on an inclined plane, so as to operate as magazines or feeders for automatically feeding the fuel to the fire in the fire-chamber D; but, when horizontally in the usual manner.

Preferably the fire-chamber -D and ash-pit E are made in a cylindrical form, so-as to conform to the form and diameter of the primary boiler A. The heated-air chamber G has no communication with the fire-chamber D, nor with the flue F, the upper end of said air-chamber being closed by a plate K, and

pose of conveying the feed-water thereinto,

and said feed-pipe may be connected to a feed-pump,-a return-pipe of a steameheating system,- or to any other appliance for supplying feed-water to steam-boilers.

By makingthe primary and secondary boilers separable from each other in the manner herein described we reduce them to a form which renders them readily transportable, andwhen made in the form described thetwo boilers are capable of being separately used as an ordinary upright tubular boiler,each one independentlyof the other, by simply separating the joint in the middle of the connectingpipesand closing the outer-end of the sec- Said boilers can then be separately placed in the ordinary tions of said connecting-pipes.

setting-with a suitable fire-chamber under each.

We" do not confine ourselves to locating the escape-outlet I ator near the upper-endv of the secondary boiler, as shown in Fig. 1, as said outlet maybe located near the lower end of said boiler, and in some instances the latter location maybe more convenient for forming a connection with a chimney or flue, and

for that reason'might bepreferable. Nor do We limit ourselves to providing a heated-air chamber for our boiler-setting; but we prefer to retain all the features of construction of our invention as hereinbefore described.

, The. courseof the gases, and other heated products of combustion of the fuel in the firechamber D, as indicated by arrows in Fig. 1, will be as follows: They first pass upwardly through the tubes of the primary boiler A, then rearwardly through the pass-over flue F, then downwardly through the tubes of the secondary boiler. B, and then upwardly through the flue H to the escape-outlet I, from which they are conveyed into the atmosphere through any suitable flue or chimney.

What we claim as our invention, and desire to secure by Letters Patent, is

1. A steam-boiler which-is composed of a primary and a secondaryboiler placed side by side and separably connected'together by upper and lower 4 connecting-pipeseoneabove and theother below the Water-level line of said boiler-both of said connecting-pipesbeing flanged together at or near the middle'of their lengths, and each of said boilers being provided with a series of tubes throughwhich the heated gaseous products of I combustion will pass,-'substantially as herein specified.

2. In .a steam-boiler, the combination of a fire-chamber, a primary boiler provided with tubesand fixed directly over said fire-chamher, a secondary boiler provided with 1 tubes and connected by steam and water pipesto said primary boiler, and a dead-airchamber for containing heated air located between saidprimary boiler and secondary boiler, as and for-the purpose herein specified.

1 HUGH PATTERSON; 4

JOHN MACCORMACK. HARRY L. VAN ZILE. \Vitnesses:

WM. H. LOW, S. B. BREWER. 

